VM runtime performance bottlenecks under high load

7/10 High

Services with high load perform poorly within Railway's opinionated runtime environment due to restrictive cgroup settings and limited tunability. Critical limitations like file descriptor limits (stuck at 1000) cannot be modified, and promised VM runtime upgrades have stalled.

Railway
Category
performance
Workaround
none
Stage
deploy
Freshness
worsening
Scope
single_lib
Upstream
open
Recurring
Yes
Buyer Type
team
Maintainer
abandoned

Sources

Collection History

Query: “What are the most common pain points with Railway for developers in 2025?”4/7/2026

There are many cases of 'high load' services that perform horribly within Railways opinionated runtime (restricted cgroup, limited tweaks to be made)... can't modify filedescriptor limits (stuck at 1000 on Railway, no permission to edit)

Created: 4/7/2026Updated: 4/7/2026